1、The shell is made of quality plastic, eco-friendly, anti-aging and durable. 2、Built-in sensor accurately detects the temperature of fish tank. 3、Easy to install to the wall of the fish tank. 4、Small size and lightweight, easy to carry. 5、The LCD Display Thermometer is moisture resistant and not affected by the environment, which will give accurate reading and display. Features:  The shell is made of quality plastic, eco-friendly, anti-aging and durable. Built-in sensor accurately detects the temperature of fish tank. High brightness display screen is clear and easy to read. Easy to install to the wall of the fish tank. Small size and lightweight, easy to carry. The LCD Display Thermometer is moisture resistant and not affected by the environment, which will give accurate reading and display.  Specification: Item Type: Digital Thermometer Material: Plastic Shell, Electronic Components Optional Colors: Yellow, Black Battery Supply: 2 x AG13 Button Cell(included)  Rated Voltage: DC 1.5V Measuring Range: -50°C-70°C Humidity display resolution: 1% Humidity sampling period: 10 seconds (1 minute) Humidity measurement accuracy: ±5% Temperature measurement accuracy: ±1 degree (at normal temperature) Dimensions: 5.8* 3.5* 1.6cm / 2.3* 1.4* 0.6inch LCD Size: 2.6* 1.36cm / 1* 0.5inch Weight: Approx. 34g Package List: 1 *  Digital Thermometer 1 * Sucker 2 * Button Cells